Here's what rhymes with roentgeu.
coup qu ku coo cou gu goo to who you do two new too true due knew blue drew du grew que u crew blew q shoe zu clue cue dew glue lieu queue shew su sue tu vous chew cu deux fu lu rue zoo brew bu hu ju jus loo mu nu peu pew pu seu shu sou vu woo yew yu beaucoup boo chou chu doo ewe feu ru shou thu tue tzu vou wou wu clew moo pooh poo shoo gnu roux thew whew achoo through few view pursue threw flew screw anew canoe hue accrue flue slew stew taboo untrue adieu ado flu jusqu piu skew tattoo thru fue hew mieux outdo shrew sprue vue imbue mew outgrew strew spew endue indue kazoo slue phew booboo into bamboo renew undue debut ensue rendezvous subdue undo overdue eschew vnto askew overdo redo halloo valuer bugaboo fondue foreknew zebu peekaboo buckaroo muumuu overshoe overdrew overgrew wazoo regrew atishoo review interview revenue overview residue withdrew avenue retinue caribou construe overthrew kangaroo revue shampoo sinew ballyhoo cockatoo honeydew marabou bestrew overflew prevue superglue hitherto barbecue barbeque hullabaloo misconstrue